Answer the problem involving permutations with restrictions. Show your solution. 1. In how many ways can 3 boys and 2 girls be seated in a row for picture taking if the boys would like to sit together? 2. There are 4 different Statistics books and 5 different Probability books. In how ways can the books be arranged on a shelf if a. there are no restrictions? b. books of the same subject must be placed together? c. they must be placed alternately?

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